src/mesa/drivers/dri/i965/brw_wm.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   */
  31
  32 #include "main/texformat.h"
  33 #include "brw_context.h"
  34 #include "brw_util.h"
  35 #include "brw_wm.h"
  36 #include "brw_state.h"
  37
  38
  39 /** Return number of src args for given instruction */
  40 GLuint brw_wm_nr_args( GLuint opcode )
  41 {
  42    switch (opcode) {
  43    case WM_PIXELXY:
  44    case WM_CINTERP:
  45    case WM_WPOSXY:
  46       return 1;
  47    case WM_LINTERP:
  48    case WM_DELTAXY:
  49    case WM_PIXELW:
  50       return 2;
  51    case WM_FB_WRITE:
  52    case WM_PINTERP:
  53       return 3;
  54    default:
  55       assert(opcode < MAX_OPCODE);
  56       return _mesa_num_inst_src_regs(opcode);
  57    }
  58 }
  59
  60
  61 GLuint brw_wm_is_scalar_result( GLuint opcode )
  62 {
  63    switch (opcode) {
  64    case OPCODE_COS:
  65    case OPCODE_EX2:
  66    case OPCODE_LG2:
  67    case OPCODE_POW:
  68    case OPCODE_RCP:
  69    case OPCODE_RSQ:
  70    case OPCODE_SIN:
  71    case OPCODE_DP3:
  72    case OPCODE_DP4:
  73    case OPCODE_DPH:
  74    case OPCODE_DST:
  75       return 1;
  76
  77    default:
  78       return 0;
  79    }
  80 }
  81
  82
  83 static void do_wm_prog( struct brw_context *brw,
  84                         struct brw_fragment_program *fp,
  85                         struct brw_wm_prog_key *key)
  86 {
  87    struct brw_wm_compile *c;
  88    const GLuint *program;
  89    GLuint program_size;
  90
  91    c = brw->wm.compile_data;
  92    if (c == NULL) {
  93      brw->wm.compile_data = calloc(1, sizeof(*brw->wm.compile_data));
  94      c = brw->wm.compile_data;
  95    } else {
  96      memset(c, 0, sizeof(*brw->wm.compile_data));
  97    }
  98    memcpy(&c->key, key, sizeof(*key));
  99
 100    c->fp = fp;
 101    c->env_param = brw->intel.ctx.FragmentProgram.Parameters;
 102
 103     brw_init_compile(brw, &c->func);
 104    if (brw_wm_is_glsl(&c->fp->program)) {
 105        brw_wm_glsl_emit(brw, c);
 106    } else {
 107        /* Augment fragment program.  Add instructions for pre- and
 108         * post-fragment-program tasks such as interpolation and fogging.
 109         */
 110        brw_wm_pass_fp(c);
 111
 112        /* Translate to intermediate representation.  Build register usage
 113         * chains.
 114         */
 115        brw_wm_pass0(c);
 116
 117        /* Dead code removal.
 118         */
 119        brw_wm_pass1(c);
 120
 121        /* Register allocation.
 122         */
 123        c->grf_limit = BRW_WM_MAX_GRF/2;
 124
 125        brw_wm_pass2(c);
 126
 127        c->prog_data.total_grf = c->max_wm_grf;
 128        if (c->last_scratch) {
 129            c->prog_data.total_scratch =
 130                c->last_scratch + 0x40;
 131        } else {
 132            c->prog_data.total_scratch = 0;
 133        }
 134
 135        /* Emit GEN4 code.
 136         */
 137        brw_wm_emit(c);
 138    }
 139    if (INTEL_DEBUG & DEBUG_WM)
 140       fprintf(stderr, "\n");
 141
 142    /* get the program
 143     */
 144    program = brw_get_program(&c->func, &program_size);
 145
 146    dri_bo_unreference(brw->wm.prog_bo);
 147    brw->wm.prog_bo = brw_upload_cache( &brw->cache, BRW_WM_PROG,
 148                                        &c->key, sizeof(c->key),
 149                                        NULL, 0,
 150                                        program, program_size,
 151                                        &c->prog_data,
 152                                        &brw->wm.prog_data );
 153 }
 154
 155
 156
 157 static void brw_wm_populate_key( struct brw_context *brw,
 158                                  struct brw_wm_prog_key *key )
 159 {
 160    GLcontext *ctx = &brw->intel.ctx;
 161    /* BRW_NEW_FRAGMENT_PROGRAM */
 162    struct brw_fragment_program *fp =
 163       (struct brw_fragment_program *)brw->fragment_program;
 164    GLuint lookup = 0;
 165    GLuint line_aa;
 166    GLuint i;
 167
 168    memset(key, 0, sizeof(*key));
 169
 170    /* Build the index for table lookup
 171     */
 172    /* _NEW_COLOR */
 173    if (fp->program.UsesKill ||
 174        ctx->Color.AlphaEnabled)
 175       lookup |= IZ_PS_KILL_ALPHATEST_BIT;
 176
 177    if (fp->program.Base.OutputsWritten & (1<<FRAG_RESULT_DEPR))
 178       lookup |= IZ_PS_COMPUTES_DEPTH_BIT;
 179
 180    /* _NEW_DEPTH */
 181    if (ctx->Depth.Test)
 182       lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
 183
 184    if (ctx->Depth.Test &&
 185        ctx->Depth.Mask) /* ?? */
 186       lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
 187
 188    /* _NEW_STENCIL */
 189    if (ctx->Stencil.Enabled) {
 190       lookup |= IZ_STENCIL_TEST_ENABLE_BIT;
 191
 192       if (ctx->Stencil.WriteMask[0] ||
 193           ctx->Stencil.WriteMask[ctx->Stencil._BackFace])
 194          lookup |= IZ_STENCIL_WRITE_ENABLE_BIT;
 195    }
 196
 197    line_aa = AA_NEVER;
 198
 199    /* _NEW_LINE, _NEW_POLYGON, BRW_NEW_REDUCED_PRIMITIVE */
 200    if (ctx->Line.SmoothFlag) {
 201       if (brw->intel.reduced_primitive == GL_LINES) {
 202          line_aa = AA_ALWAYS;
 203       }
 204       else if (brw->intel.reduced_primitive == GL_TRIANGLES) {
 205          if (ctx->Polygon.FrontMode == GL_LINE) {
 206             line_aa = AA_SOMETIMES;
 207
 208             if (ctx->Polygon.BackMode == GL_LINE ||
 209                 (ctx->Polygon.CullFlag &&
 210                  ctx->Polygon.CullFaceMode == GL_BACK))
 211                line_aa = AA_ALWAYS;
 212          }
 213          else if (ctx->Polygon.BackMode == GL_LINE) {
 214             line_aa = AA_SOMETIMES;
 215
 216             if ((ctx->Polygon.CullFlag &&
 217                  ctx->Polygon.CullFaceMode == GL_FRONT))
 218                line_aa = AA_ALWAYS;
 219          }
 220       }
 221    }
 222
 223    brw_wm_lookup_iz(line_aa,
 224                     lookup,
 225                     key);
 226
 227
 228    /* BRW_NEW_WM_INPUT_DIMENSIONS */
 229    key->projtex_mask = brw->wm.input_size_masks[4-1] >> (FRAG_ATTRIB_TEX0 - FRAG_ATTRIB_WPOS);
 230
 231    /* _NEW_LIGHT */
 232    key->flat_shade = (ctx->Light.ShadeModel == GL_FLAT);
 233
 234    /* _NEW_TEXTURE */
 235    for (i = 0; i < BRW_MAX_TEX_UNIT; i++) {
 236       const struct gl_texture_unit *unit = &ctx->Texture.Unit[i];
 237
 238       if (unit->_ReallyEnabled) {
 239          const struct gl_texture_object *t = unit->_Current;
 240          const struct gl_texture_image *img = t->Image[0][t->BaseLevel];
 241          if (img->InternalFormat == GL_YCBCR_MESA) {
 242             key->yuvtex_mask |= 1 << i;
 243             if (img->TexFormat->MesaFormat == MESA_FORMAT_YCBCR)
 244                 key->yuvtex_swap_mask |= 1 << i;
 245          }
 246
 247          key->tex_swizzles[i] = t->_Swizzle;
 248       }
 249       else {
 250          key->tex_swizzles[i] = SWIZZLE_NOOP;
 251       }
 252    }
 253
 254    /* Shadow */
 255    key->shadowtex_mask = fp->program.Base.ShadowSamplers;
 256
 257    /* _NEW_BUFFERS */
 258    /*
 259     * Include the draw buffer origin and height so that we can calculate
 260     * fragment position values relative to the bottom left of the drawable,
 261     * from the incoming screen origin relative position we get as part of our
 262     * payload.
 263     *
 264     * We could avoid recompiling by including this as a constant referenced by
 265     * our program, but if we were to do that it would also be nice to handle
 266     * getting that constant updated at batchbuffer submit time (when we
 267     * hold the lock and know where the buffer really is) rather than at emit
 268     * time when we don't hold the lock and are just guessing.  We could also
 269     * just avoid using this as key data if the program doesn't use
 270     * fragment.position.
 271     *
 272     * This pretty much becomes moot with DRI2 and redirected buffers anyway,
 273     * as our origins will always be zero then.
 274     */
 275    if (brw->intel.driDrawable != NULL) {
 276       key->origin_x = brw->intel.driDrawable->x;
 277       key->origin_y = brw->intel.driDrawable->y;
 278       key->drawable_height = brw->intel.driDrawable->h;
 279    }
 280
 281    /* Extra info:
 282     */
 283    key->program_string_id = fp->id;
 284
 285 }
 286
 287
 288 static void brw_prepare_wm_prog(struct brw_context *brw)
 289 {
 290    struct brw_wm_prog_key key;
 291    struct brw_fragment_program *fp = (struct brw_fragment_program *)
 292       brw->fragment_program;
 293
 294    brw_wm_populate_key(brw, &key);
 295
 296    /* Make an early check for the key.
 297     */
 298    dri_bo_unreference(brw->wm.prog_bo);
 299    brw->wm.prog_bo = brw_search_cache(&brw->cache, BRW_WM_PROG,
 300                                       &key, sizeof(key),
 301                                       NULL, 0,
 302                                       &brw->wm.prog_data);
 303    if (brw->wm.prog_bo == NULL)
 304       do_wm_prog(brw, fp, &key);
 305 }
 306
 307
 308 /* See brw_wm.c:
 309  */
 310 const struct brw_tracked_state brw_wm_prog = {
 311    .dirty = {
 312       .mesa  = (_NEW_COLOR |
 313                 _NEW_DEPTH |
 314                 _NEW_STENCIL |
 315                 _NEW_POLYGON |
 316                 _NEW_LINE |
 317                 _NEW_LIGHT |
 318                 _NEW_BUFFERS |
 319                 _NEW_TEXTURE),
 320       .brw   = (BRW_NEW_FRAGMENT_PROGRAM |
 321                 BRW_NEW_WM_INPUT_DIMENSIONS |
 322                 BRW_NEW_REDUCED_PRIMITIVE),
 323       .cache = 0
 324    },
 325    .prepare = brw_prepare_wm_prog
 326 };
 327